$OpenBSD: patch-natpmp_c,v 1.1 2016/09/10 13:03:42 ajacoutot Exp $
--- natpmp.c.orig	Sat Sep 10 12:02:47 2016
+++ natpmp.c	Sat Sep 10 12:02:53 2016
@@ -11,6 +11,7 @@
 #include <errno.h>
 #include <time.h>
 #include <sys/types.h>
+#include <sys/select.h> /* fd_set */
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
